A clinical study at the end of 2023 showed that red meat and processed meat can become a cause of diabetes. The authors published the results of this study in The American Journal of Clinical Nutrition on December 2023.
Results of the study
Notably, the study consisted of several pooled studies. To emphasize, there was a total of 216,695 participants and the authors followed them up every 2 to 4 years. In detail, the investigators analyzed food frequency questionnaires for consumption of red meat, processed meat, and consumption of nuts and legumes. In particular, the authors compared the highest and lowest red meat consumption quintiles. Those who ate the highest amounts of total red meat had a risk of 1.62-fold to develop diabetes. With regard to processed meat the risk was 1.51-fold to develop diabetes. And those who consumed unprocessed red meat had a risk of 1.40-fold to develop diabetes.
• When people replaced 1 serving of meat per day with nuts and legumes, this reduced their risk for diabetes by 30%.
• A group that had replaced processed red meat by 1 serving/day with nuts and legumes reduced the risk for diabetes by 41%.
• Replacing unprocessed red meat by 1 serving/day with nuts and legumes reduced the risk for diabetes by 29%.
Some scientists criticized the study saying that it was not controlled for elevated body mass index (BMI). A person with an elevated BMI is at a higher risk of developing diabetes on its own and this can interfere with a study like this.
Alternative large study confirming risk of red meat to develop diabetes
This study was a meta-analysis, which involved data from 31 cohorts participating in the InterConnect project. There was a total of 1,966,444 adults in this study and 107,271 patients developed diabetes over a period of 10 years.
• People who ate unprocessed meat had a 10% increase of diabetes risk compared to people not consuming meat.
• When processed meat was consumed it caused diabetes in 15% of the study group.
• On the other hand, poultry consumption caused only 8% of diabetes.
There were slight regional differences for the same foods. In the discussion of the data the authors pointed out that in comparison to the first study mentioned above their risk ratios were lower, because all the data was corrected for compounding factors that could distort the figures. As an example, they noted that without BMI adjustment unprocessed meat would have caused 18% of diabetes. On the other hand, processed meat would have caused 23% of diabetes and 21% of diabetes for poultry consumption.
Recommendation to reduce or eliminate red meat consumption
The American Institute for Cancer Research recommends to eat less than 18 oz. of red meat or processed meat per week to avoid cancer development.
You can replace meat with nuts, legumes (lentils and beans), tofu and vegetables.
Red Meat and Processed Meat Can Become a Cause of Diabetes
Conclusion
Two independent large studies concluded that consumption of red meat and processed red meat contributed to diabetes development in adults. We also know from other studies that it can cause cancer. The key is to replace red and processed red meat by nuts, tofu, legumes and other vegetables. Both studies have shown that doing so reduces the risk for diabetes.
